Senkou "The Lightning Flash"
Senkou is Kurokenshi's girlfriend, an incredibly fast fencer, who has disappeared. All Kurokenshi's thoughts are bent on finding her.
Senkou was an intensely skilled player and fencer before she disappeared, being one of the few people who could keep up with Kurokenshi and not seem tired down by it. Her real name was Yui Kazuto, and in the real world she was Kurokenshi’s girlfriend, and they had a very close relationship. Kurokenshi fights with the fervor of a demon to find her.